<template>
  <div class="tags" v-if="tags.show">
    <ul>
      <li class="tags-li" v-for="(item, index) in tags.list" :class="{ active: isActive(item.path) }" :key="index" :data-index="index">
        <router-link :to="item.path" class="tags-li-title">
          {{ item.title }}
        </router-link>
        <el-icon @click="closeTags(index)">
          <Close />
        </el-icon>
      </li>
    </ul>
    <div class="tags-close-box">
      <el-dropdown @command="handleTags">
        <el-button type="primary">
          标签选项<el-icon class="el-icon--right">
            <arrow-down />
          </el-icon>
        </el-button>
        <template #dropdown>
          <el-dropdown-menu>
            <el-dropdown-item command="other">关闭其他</el-dropdown-item>
            <el-dropdown-item command="all">关闭所有</el-dropdown-item>
          </el-dropdown-menu>
        </template>
      </el-dropdown>
    </div>
  </div>
</template>

<script setup lang="ts">
import { useTagsStore } from "@/store/tags";
import { onBeforeRouteUpdate, useRoute, useRouter, type RouteLocationNormalizedLoadedGeneric } from "vue-router";

const route = useRoute();
const router = useRouter();
function isActive(path: string) {
  return path === route.path;
}
const tags = useTagsStore();

// 关闭单个标签
function closeTags(index: number) {
  const delItem = tags.list[index];
  tags.delTagsItem(index);
  const item = tags.list[index] ? tags.list[index] : tags.list[index - 1];
  if (item) {
    if (delItem.path === route.path) {
      router.push(item.path);
    }
  } else {
    router.push("/");
  }
}

// 设置标签
function setTags(route: RouteLocationNormalizedLoadedGeneric) {
  const isExist = tags.list.some(item => {
    return item.path === route.path;
  });
  if (!isExist) {
    if (tags.list.length >= 8) tags.delTagsItem(0);
    tags.setTagsItem({
      name: route.name as string,
      title: route.meta.title as string,
      path: route.path,
      fullPath: route.fullPath
    });
  }
}
setTags(route);
onBeforeRouteUpdate(to => {
  setTags(to);
});

// 关闭全部标签
function closeAll() {
  tags.clearTags();
  router.push("/");
}
// 关闭其他标签
function closeOther() {
  const curItem = tags.list.filter(item => {
    return item.path === route.fullPath;
  });
  tags.closeTagsOther(curItem);
}
function handleTags(command: "other" | "all") {
  if (command === "other") {
    closeOther();
  } else {
    closeAll();
  }
}
</script>

<style>
.tags {
  position: relative;
  height: 32px;
  padding: 2px;
  overflow: hidden;
  background: #fff;
  padding-right: 120px;
  box-shadow: 0 5px 10px #ddd;
}

.tags ul {
  box-sizing: border-box;
  width: 100%;
  height: 100%;
}

.tags-li {
  display: flex;
  align-items: center;
  float: left;
  margin: 2px 5px 2px 3px;
  border-radius: 3px;
  font-size: 12px;
  overflow: hidden;
  cursor: pointer;
  height: 25px;
  line-height: 25px;
  border: 1px solid #e9eaec;
  background: #fff;
  padding: 0 5px 0 12px;
  vertical-align: middle;
  color: #666;
  -webkit-transition: all 0.3s ease-in;
  -moz-transition: all 0.3s ease-in;
  transition: all 0.3s ease-in;
}

.tags-li:not(.active):hover {
  background: #f8f8f8;
}

.tags-li.active {
  color: #fff;
}

.tags-li-title {
  float: left;
  max-width: 80px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  margin-right: 5px;
  color: #666;
}

.tags-li.active .tags-li-title {
  color: #fff;
}

.tags-close-box {
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  right: 2px;
  top: 3px;
  box-sizing: border-box;
  text-align: center;
  width: 110px;
  height: 30px;
  background: #fff;
  box-shadow: -3px 0 15px 3px rgba(0, 0, 0, 0.1);
  z-index: 10;
}
</style>
